OPF meaning in Space Science ?

Answer: What is Orbiter Processing Facility mean?

Orbiter Processing Facility (OPF) is a class of hangars where U.S. Space Shuttle orbiters underwent maintenance between flights. They are located west of the Vehicle Assembly Building, where the orbiter was mated with its External Tank and Solid Rocket Boosters before transport to the launch pad. OPF-1 and OPF-2 are connected with a low bay between them, while OPF-3 is across the street.

OPF-3 was previously called the Orbiter Maintenance & Refurbishment Facility (OMRF), but was upgraded to a fully functioning OPF.

reference

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Office for Postdoctoral Fellows	Academic & Science
Open Pension Fund	Business
Overseas Pakistani Foundation	Community
Optimum Path Forest	Community
Orchestra Parents And Friends	Community
Orthodox Peace Fellowship	Community
Oregon Psychoanalytic Foundation	Community
Overseer Plug-in File	Computing
Organizational Process Focus	Computing
Optimal Power Flow	Electronics
Operation Plan Framework	General
Open Payments Framework	General
Overactive Pelvic Floor	General
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Otto Partikel Filter	General
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Open Planets Foundation	General
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Overseas Pakistanis Foundation	General
Oriental Pacific Futures	General
Open Package Format	General
Optoelectronic Processing Facility	General
Official Personnel Folders	General
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On The Plant Floor	General
Orangutan Protection Foundation	General
OPEN Process Framework	General
Online Prediction Framework	General
Open Preservation Foundation	General
Ore Processing Facilities	General
Order Processing Fee	General
Organic Phase Fluid	General
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Orlin P Fay	General
Onshore Processing Facility	General
Official Personnel Folder	Governmental
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Orbiter Processing Facility	Space Science